Why are you thankful? Do you need accessibility, and if so, what do you use?
Inevitably someone complains about lack of accessibility of a custom UI toolkit, which is frustrating, because something that helps 99% of people is still an improvement and still worth doing.
The argument would be that a new GUI toolkit will capture applications that would otherwise be made with an older, accessible toolkit. In that sense, it‘s a regression, not just a clear improvement.
I do agree about the idea though. We shouldn't shut down experiments just because they don‘t have a plan for it yet. I do see some of that on twitter etc. But once you‘re shipping software that users can‘t switch away from, because of network effects or because it‘s at work, it‘s not ok.
Inevitably someone complains about lack of accessibility of a custom UI toolkit, which is frustrating, because something that helps 99% of people is still an improvement and still worth doing.